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1 Null Subjects, "Universal Grammar in Child Second Language Acquisition" 1994
2 Raposo, Eduardo, "Two types of small clauses Toward a syntax of theme/rheme relations" New York: Academic Press 28 : 178-208, 1995
3 An introduction, "Topic continuity in discourse Topic Continuity in discourse" 1-42, 1983
4 White, "The pro-drop parameter in adult second language acquisition" 47-62, 1985
5 Vainikka, Anne, "The initial state in the L2 acquisi-tion of phrase structure" Mahwah, NJ: Law-rence Erlbaum Associates 17-34, 1997
6 Rizzi, Luigi, "The fine structure of the left periphery" Dordrecht: Kluwer Academic Publishers 281-337, 1997
7 Suh, "The distribution of topic- and nominative-marked phrases in Ko-rean The universality of IP structure MIT Working Papers in Linguistics 16" 207-221, 1992
8 Wakabayashi, Shigenori, "The acquisition of non-null subjects in English: A minimalist account" 18 (18): 23-71, 2002
9 Kim, Young Joo, "The acquisition of Korean" Hillsdale, NJ: Lawrence Erlbaum As-sociates Publishers 4 : 335-443, 1997
10 Robert, "The accessibility of Universal Grammar in adult language learning" 1-32, 1988
11 Moon, "The Syntax of Null Arguments with Special Reference to Korean University of Texas at Austin" Unpublished doctoral dissertation 1989
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13 Chomsky, Noam, "The Minimalist Program" Cambridge, MA: MIT Press 1995
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28 Chomsky, Noam, "Minimalist inquiries" Cambridge, MA: MIT Press 89-155, 2000
29 Origin, "Knowledge of Language" (am) : 1986
30 White, "Implications of parametric variation for adult second language ac-quisition An investigation of the pro-drop parameter Experimen-tal Approaches to Second Language Acquisition" 55-72, 1986
31 Yip, Virginia, "I-interlanguage and typology: The case of topic-prominence" Amsterdam: John Benjamins 17-30, 1995
32 Choe, Hyon Sook, "Focus and topic movement in Korean and licensing" Oxford: Oxford University Press 269-334, 1995
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34 Kuroda, "Evidence from Japa-nese syntax Foundation of Language 9" 153-185, 1972
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37 Chomsky, Noam, "Derivation by phase" Cambridge, MA: MIT Press 1-52, 2001
38 Heycock, Caroline, "Categorical subjects" 2003
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42 Kim, So-Young, "A Comparison between L1 and L2 Acquisition: Null Argument Phenomena in the Acquistion of English" 2007.May